/*
 *  Copyright 2008-2013 NVIDIA Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#pragma once

#include <thrust/detail/config.h>

#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
#  pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
#  pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
#  pragma system_header
#endif // no system header
#include <thrust/detail/allocator/temporary_allocator.h>
#include <thrust/detail/temporary_buffer.h>
#include <thrust/system/detail/bad_alloc.h>

#include <cuda/std/cassert>

#include <nv/target>

#if THRUST_DEVICE_SYSTEM == THRUST_DEVICE_SYSTEM_CUDA
#  if _CCCL_DEVICE_COMPILATION()
#    include <thrust/system/cuda/detail/terminate.h>
#  endif // _CCCL_DEVICE_COMPILATION()
#endif // CUDA

THRUST_NAMESPACE_BEGIN
namespace detail
{

template <typename T, typename System>
_CCCL_HOST_DEVICE typename temporary_allocator<T, System>::pointer
temporary_allocator<T, System>::allocate(typename temporary_allocator<T, System>::size_type cnt)
{
  pointer_and_size result = thrust::get_temporary_buffer<T>(system(), cnt);

  // handle failure
  if (result.second < cnt)
  {
    // deallocate and throw
    // note that we pass cnt to deallocate, not a value derived from result.second
    deallocate(result.first, cnt);

#if THRUST_DEVICE_SYSTEM == THRUST_DEVICE_SYSTEM_CUDA
    NV_IF_TARGET(NV_IS_HOST,
                 (throw thrust::system::detail::bad_alloc("temporary_buffer::allocate: get_temporary_buffer failed");),
                 ( // NV_IS_DEVICE
                   thrust::system::cuda::detail::terminate_with_message("temporary_buffer::allocate: "
                                                                        "get_temporary_buffer failed");));
#else
    throw thrust::system::detail::bad_alloc("temporary_buffer::allocate: get_temporary_buffer failed");
#endif
  } // end if

  return result.first;
} // end temporary_allocator::allocate()

template <typename T, typename System>
_CCCL_HOST_DEVICE void temporary_allocator<T, System>::deallocate(
  typename temporary_allocator<T, System>::pointer p, typename temporary_allocator<T, System>::size_type n) noexcept
{
  return thrust::return_temporary_buffer(system(), p, n);
} // end temporary_allocator

} // namespace detail
THRUST_NAMESPACE_END
